That's correct, you can't reproduce the problem unless there's a sql
call between the exception and your call to errnum(), which occurs on
the rollback of a transaction. If you run the deadlock tests, it
demonstrates it.
> -----Original Message-----
> From: Warren Young [mailto:mysqlpp@stripped]
> Sent: Thursday, October 25, 2007 9:16 AM
> To: MySQL++ Mailing List
> Subject: Re: Expose errnum() in query -- BadQuery w/Errnum
> patch part 3
>
> Jim Wallace wrote:
> > + /// If you want the string *and* number you must
> > + /// call errnum() before calling error() since error() clears
>
> I tried to replicate that by causing an error in one of the
> examples, then calling Connection::errnum(), then error(),
> then errnum() again, and it shows the same number both times.
>
> I think this is just leftover confusion from your initial
> problem diagnosis process. It's not mysql_error() clearing
> the error number, it's the second error caused by the
> transaction failure.
>
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